University of Ilorin Institutional RepositoryThe DSpace digital repository system captures, stores, indexes, preserves, and distributes digital research material.http://localhost:80/jspui2018-02-16T00:31:14Z2018-02-16T00:31:14ZFertilizer treatment effects on yield and quality parameters of sweet potato (Ipomoea batatas).Kareem, Isiakahttp://hdl.handle.net/123456789/892018-01-05T16:44:39Z2013-01-01T00:00:00ZTitle: Fertilizer treatment effects on yield and quality parameters of sweet potato (Ipomoea batatas).
Authors: Kareem, Isiaka
Abstract: Currently the world is moving towards organic production of crops for the discovered and envisaged advantages. Despite
this, farmers are faced with the challenges of the bulkiness of organic fertilizer to be used and further gains that could be
accrued from it even if sacrifice of using it is made. To be quite sure of the appropriate fertilizer type to be used in
improving quality as well as the tuber yield of sweet potato, this work, therefore, evaluated the effectiveness of organic,
inorganic and organo-mineral fertilizers on quality determinants of sweet potato as well as its tuber yield.
This experiment was carried out at the Teaching and Research Farm, University of Ibadan. The treatments applied were
Pacesetter organic fertilizer at the rate of 3t/ha, inorganic fertilizer (NPK 15:15:15) at the rate 130kg/ha while organomineral
fertilizer (comprising NPK 15:15:15 and Pacesetter organic fertilizer) was at the rate of 1.5t/ha and the control
.The experiment was laid out in randomized complete block design (RCBD) with tree replications and the fertilizer
treatments were applied at four weeks after planting. At maturity, destructive sampling was embarked upon and the
sampled plants were partitioned into leaves and tubers. The fresh and dry weights of the samples were taken after which
their proximate analyses were done to determine the levels of the quality determinants (moisture content, crude protein,
crude fat, crude fibre, Vitamin A and ash content) in them. Final harvesting was done at the end of the experiment to
determine the yield per treatments. The data collected were analysed using analysis of variance (ANOVA) with the aid
GENSTAT 5 package and significant means were separated using Least Significant Difference (LSD) at 5% probability
level.
The results indicated that all the above mentioned quality determinants of sweet potato leaves and tubers were not
significantly increased by the fertilizer treatments used except for ether extract in the tubers which was significantly
improved by organic fertilizer. Also, leaf and tuber dry matter production were not significantly increased by the applied
treatments. However, inorganic as well as organic fertilizers significantly increased the final fresh tuber yield of the crop.
It was also found that leaves of sweet potato had higher levels of quality indicators than the tubers except for energy
content which was higher in the tubers.
It is, therefore, recommended that organic fertilizer and, to a lesser extent, inorganic fertilizer (NPK 15: 15:15) be relied
upon to increase tuber yield of the crop. Finally, sweet potato should be produced with organic fertilizer since it is more
advantageous and the inorganic fertilizer did not produce much higher than it did.2013-01-01T00:00:00ZGISTM S4 data from IlorinOladipo, Olushola Abelhttp://hdl.handle.net/123456789/882018-01-05T16:43:28Z2017-12-20T00:00:00ZTitle: GISTM S4 data from Ilorin
Authors: Oladipo, Olushola Abel
Abstract: The GISTM data format from Ilorin, Nigeria
The files are monthly files.
FileName is of the form 'ilrnmmyyyy' where 'ilrn' is the station code, 'mm' is the month of the year
and 'yyyy' is the year.
Column data type
[1] - Time in UTC
[2] - PRN
[3] - Az
[4] - elevation
[5] - CNo.
[6] - Lock time
[7] - S4 @ L1
[8] - DOY
Description: GISTM Scintillation data2017-12-20T00:00:00ZGPStation-6 DataOladipo, Olushola Abelhttp://hdl.handle.net/123456789/872018-01-05T16:40:30Z2017-11-30T00:00:00ZTitle: GPStation-6 Data
Authors: Oladipo, Olushola Abel2017-11-30T00:00:00ZSpectrophotometric studies of a novel Gedunin-2-Hydroxypropyl- β-cyclodextrin binary systemOloge MO, MOAdegoke, AOIwalewa, EOAdemowo, OGhttp://hdl.handle.net/123456789/862017-12-04T16:22:12Z2016-01-01T00:00:00ZTitle: Spectrophotometric studies of a novel Gedunin-2-Hydroxypropyl- β-cyclodextrin binary system
Authors: Ologe MO, MO; Adegoke, AO; Iwalewa, EO; Ademowo, OG
Abstract: Background: Gedunin, a limonoid, is linked with antimalarial, anticancer and anti-allergic activities. This study was aimed at preparing an inclusion complex of gedunin and 2-hydroxypropyl-β-cyclodextrin (HBD) to increase solubility of gedunin in polar solvents which will increase absorption and bioavailability in vivo and thus enhance pharmacological effects.
Materials and methods: Gedunin was obtained from the hexane extract of Entandrophragma angolense heartwood by column and preparative thin layer chromatography. The structure was previously confirmed by spectroscopic means (NMR). The electronic absorption spectra data of the complexes formed between gedunin and HBD in various solvents was determined using the UV-VIS spectrophotometer. The stoichiometry of inclusion was determined by Job’s method of continuous variation.
Results: Evidence of interaction was observed between gedunin and HBD in the various solvents but gedunin
and its complex with HBD exhibited sharp absorption bands in acetate buffer (pH 3.5). The spectrophotometric titrations showed curves with a single point of inflexion when the experiment was carried out at 250C (298 K) and 370C (310 K). A stoichiometric ratio of 1:1 for complex formation was obtained. The formation constants (Kf) obtained at 250C and 37 0C were 9.539 x 103 M-1 and 1.853 x 104 M-1 respectively. Thermodynamic considerations revealed hydrophobic interaction between gedunin and HBD.
Conclusion: A stable inclusion complex of gedunin and HBD was formed at room and body temperature. This
complex formation involved trapping of poorly soluble gedunin into the hydrophobic core of the cyclodextrin
and may enhance the pharmacological activity of gedunin in vivo.2016-01-01T00:00:00Z